Guard for punch-presses



1. DUBISKY. GUARD FOR PUNCH PRESSES.

APPLICATION FILED FEB. 24 I921 I Patented 00h. M 1921..

3 SHEETS-SHEETL WMWM M. J. DUBISKY.

GUARD FOR PUNCH PRESSES APPLICATION FILED FEB. 24. 1921.

Patented Oct M, 1921.

3 SHEETS-- SHEET 2.

gwuanhw M. J. DUBISKY.

GUARD FOR PUNCH PRESSES.

APPLICATION FILED FEB. 24. 1921.

1 393 510 Patented (M. H, 1921..

3 SHEETS SHEEI 3- rename.

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ill. DUBISY, U15 ROGJEORD, ILLJINUIQ.

GUARD FOR. PUNCH PREl-SSJES.

To all whom it may concern."

'Be it known that ll, MICHAEL J. Dnmsnr, a citizen of the United States, residing at Rockford, in the county of Winnebago and State of Illinois, have invented certain new and useful Improvements in Guards for Punch-Presses; and I do hereby declare the following to be a full, clear, and exact descriptionof theihvention. such as will enable others skilled in the art to which it appertains to-make and use the same.

he invention aims for safety in the op,- eration of punch presses and analogous machines and to prevent injury to the operator or attendant by the premature operation of the machine.

In accordance with the invention a guard is provided and operatively connected with the movable part of the machine to be actuated thereby when the machine is in operation to push the hand of the attendant out of the way and avoid injury thereto, should the hand not be withdrawn because of premature movement of the machine, inadvertence or from other cause.

Uther objects and advantages will parent and suggest themselves as the of the invention is understood.

While the drawings illustrate an embodiment of the'invention, it is to be understood that in adapting the same to meet difierent conditions and requirements, various changes in the form, proportion and minor details of construction may be resorted to without departing from the nature of the invention.

Referring to the accompanying drawings forming a part of the specification,

Figure 1 is a front view of a punch press be apnature provided with guard means embodying the invention,

Fig. 2 is a side view,

F ig. 3 is a top plan view of the guard means,

Fig. l is an enlarged sectional detail,

Fig. 5 it a detail view of the cross head, and

Fig. 6 is a detail view of the sweeporresponding and like parts are referred to in the following description and desig nated in the several views of the drawings by like'reference characters.

The invention is shown applied to a punch press of ordinary construction and 5 embodying a frame 1 and reciprocating head 2 which carries the die or other tool.

Specification of Letters Patent. ap lication filed reentr at, rear.

stood that it is adapted for serial Ito. .MZWQ.

The attachment comprises a bracket which includes arms 3 and a cross piece 4- The cross piece has a longitudinal slot 5. The bracket may be secured to the framework of the machine in any convenient and substantial way. A bolt 6 is adjustable in the slot 5 of the bracket and is made secure in the adjusted position. A sleeve nut 7 mounted on the bolt 6 secures the latter in the adjusted position and receives a gear wheel, a guide and a cross head or These latterparts are free to move on the s eeve and are he gear wheel Patented @ct. Jlil, i921.

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cated at 10. Th havlng an edge portion rebent as indicated at 12 to form a guideway in which the rack bar 9 is slidably mounted. The guide re. tame the rack bar in proper workin posit1on. The cross head or yoke 13 is disposed next to the gear Wheel 8 and has an interlocking two move in unison. Vertical sleeves provided at the ends of the cross head and receive the members of a sweep. Set screws 15 threaded intothe sleeves 14c enage the members of the sweep and hold thelatter in. the adjusted position. sleeve nut 7 engages the cross bar 4 of the bracket and the plate 11 of the guide for the rack bar 9 is confined between said flange and the gear wheel 8.'

he sweep comprises a shank portion 16 and a curved end portion 17. The active end of the sweep is upholstered or padded to prevent injurious contact with the hand of the attendant when the device operates to brush the hand aside and prevent injury thereto. The sweep is preferably constructed of wire of suitable gage bent into the shape substantially shown. The elements comprising the shank portion 16' of the sweep are received in the, sleeves 14 and retained therein in the required adjusted position by means of the set screws '15.

of a plate 11 14 are connection therewith whereby the The flange of the punch press, nevertheless it is to lie-underanalogous machines to prevent injury to the attendant or operator. Upon downward movement of the plunger head 2, the lower end of the sweep moves across the bed of the machine and in the event of the hand not being with drawn, the sweep engages! and brushes the relation with the gear wheel,

"clearly in Fig. 1.

hand aside, thereby preventing injury there to. Normally the sweep-occupies a position atone side of the machine, as indicated most Should the machine 'be tripped prematurely, or-the attendant fail to withdraw the hand from any cause, the safety means operates positively to brush the hand aside and Srevent injury thereto, as will be readily un erstood.

To insure freedom of movement of the rack bar 9 on the bolt 10 and yet admit of said bolt being screwed up tight in the head 2, a flanged collar 10" and a reduced collar 10 are mounted on the bolt 10 with the reduced portions entering the eye of the rack bar and abutting as shown most clearly in Fi 2. Vhat is claimed is:

1. In safety means of the character specified, a pivot member, a gear wheel loose on the pivot member, a sweep in cooperative a rack bar in meshing relation with the gear wheel, and a guide mounted on the pivot member and engaging the rack bar to maintain the same in proper working position. I

2. In safety means of the character specified, a slotted cross piece, a headed pivot adjustable in theslot of the cross piece, a flanged sleeve nut on the pivot having the cross piece clamped between. the pivot head and the nut flange, a gear wheel loose on .the nut, a rack bar in mesh withthe gear wheel, a yoke loose on the nut and having interlocking engagement with the gear wheel, a sweep carried by the yoke and a guide loosely mounted on said sleeve nut and in engagement with the rack bar to maintain the same in proper working position.

3. In safety means of the. character speci= fied, a bracket comprising a slotted cross piece, a pivot member adjustable in the slots of the cross piece, a gear wheel on the pivot member, a sweep operatively connected with the gear wheel, a rack bar in meshing engagement with the gear wheel, and guide means mounted on said pivot member to direct the rack bar in its movement and maintain it in proper working position.

4. Safety means of the character specified comprising a slotted bracket, a pivot member adjustable in the slots of the bracket, a gear wheel mounted on the pivot member, a cross head loose on the pivot member and having interlocking engagement with the gear wheel, a sweep having adjustable connection with .the cross head, a rack bar in engagement with the gear wheel, and a guide mounted on said pivot member and in engagement with the rack bar for directing the same in its movement and retaining it in proper working position.

. In testimony whereof I afiix my signature in presence of two witnesses.

. MICHAEL J. DUBISKY. Witnesses:

EDWARD J. Pnrnosmus, KATHRYN E. Pmnosmus. 

